feat: add user and session

prisma/schema.prisma

@@ -11,3 +11,22 @@ model Data {
   id   Int    @id @default(autoincrement())
   data String
 }
+
+model User {
+  id       Int    @id @default(autoincrement())
+  username String @unique
+  password String
+  role     Role
+}
+
+model Session {
+  id        String   @id @default(cuid())
+  userId    Int
+  expiresAt DateTime
+  createdAt DateTime @default(now())
+}
+
+enum Role {
+  ADMIN
+  EDITOR
+}